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Fig. 43 from the 1996 enhancements paper. This slide shows optimization during a single execution of SUPEROPT of a hydrostatically compressed isogrid and ring-stiffened perfect cylindrical shell.
These results are from the “two-materials” model.
Each “spike” in the plot corresponds to a new “starting” design obtained randomly by the PANDA2 processor called AUTOCHANGE. Five PANDAOPTs per AUTOCHANGE were specified by the PANDA2 user for the execution of SUPEROPT.
In 1996 a SUPEROPT execution generated about 270 design iterations. Since then the number of design iterations in a SUPEROPT execution has been increased from about 270 to about 470. Also, a new processor, SUPERDUPEROPT, has been written which automatically executes SUPEROPT in a loop.
The purpose of SUPEROPT (and SUPERDUPEROPT) is to find a "global" optimum design. Notice that during the execution of SUPEROPT the design converges to local optima with different values of the objective (weight).
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